[Webkit-unassigned] [Bug 146454] New: AX: VoiceOver does not distinguish <mfrac> with / without bar

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=146454

            Bug ID: 146454
           Summary: AX: VoiceOver does not distinguish <mfrac> with /
                    without bar
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fred.wang at free.fr
                CC: webkit-bug-importer at group.apple.com

In bug 113720, an attribute NSAccessibilityMathLineThicknessAttribute was added to AXMathFraction to help distinguishing fractions that have a bar or not.

Compare data:text/html,<math><mrow><mo>(</mo><mfrac><mi>a</mi><mi>p</mi></mfrac><mo>)</mo></mrow></math>
(https://en.wikipedia.org/wiki/Legendre_symbol)

with data:text/html,<math><mrow><mo>(</mo><mfrac linethickness="0px"><mi>n</mi><mi>k</mi></mfrac><mo>)</mo></mrow></math>
(https://en.wikipedia.org/wiki/Combination)

However, VoiceOver does not distinguish the two cases, it always read "fraction start ...  over ... end of fraction".

I think it should instead read the one with linethickness="0px" as "fraction without bar start ...  over ... end of fraction", "stack start ... over .. end of stack" or something similar.

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